Mitsubishi Heavy Industries FDT28KXE6A Service Manual page 63

Error code
Remote controller:
WAIT
7-segment display:
1. Applicable model
All models
(In case that LED on outdoor
control PCB stays OFF)
2. Error detection method
3. Condition of error displayed
4. Presumable cause
• Fuse blown
• Noise filter anomaly
• Anomalous connection of
wire between PCBs
• Indoor control PCB anomaly
• Remote controller anomaly
• Breakage of connecting wires
of remote controller
• Outdoor control PCB anomaly
Note:
LED Green Red
Stays Off Stays Off
Indoor
Stays Off Stays Off
Outdoor
5. Troubleshooting
Diagnosis
In case that LED on
outdoor control PCB stays
OFF
A
NO
Is
power fuse (5A) on the
outdoor conrol PCB
blown?
YES
Is
AC380-415V detected at
secondary side of noise
filter?
YES
Are
connecting wires between
noise filter and inverter PCB
connected properly?
YES
Is
the connection of
connecting wire of reactor
OK?
YES
Is
there any anomaly on
outdoor fan motor?
61
–
Content
WAIT
Once turn OFF the breaker
and turn ON it again at 3
minute after power OFF
Does it become normal?
YES
NO
Check inverter before
replacement of 52C
B
NO
NO
NO
NO
YES
–
(5)
Countermeasure
Normal
(Malfunction by temporary
noise)
Refer next page
Replace noise filter
Connect the connecting
wire properly
Correct connection
(In case of breakage of
wire replace it)
Outdoor control PCB
anomaly
 Replace it
Outdoor fan motor
anomaly
 Replace it